Numerical simulation and visualization of air flow in ranque-hilsch vortex tube

Abstract: Visualization of air flow which appears in Ranque-Hilsch vortex tube is performed by numerical simulations using different turbulence models. The following turbulence models have been used during computations: k-?, k-? Realizable, k-? RNG, SST and SAS-SST. It was found out that only SAS-SST turbulence model can predict the existence of large-scale secondary vortex structures within the computational domain. The existence of large-scale secondary vortex structures is confirmed by different experimental studies.